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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
c78b9171 VD |
2 | /* |
3 | * Freescale MMA9551L Intelligent Motion-Sensing Platform driver | |
4 | * Copyright (c) 2014, Intel Corporation. | |
c78b9171 VD |
5 | */ |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/i2c.h> | |
9 | #include <linux/interrupt.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/acpi.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/gpio/consumer.h> | |
14 | #include <linux/iio/iio.h> | |
15 | #include <linux/iio/sysfs.h> | |
16 | #include <linux/iio/events.h> | |
6da93a67 | 17 | #include <linux/pm_runtime.h> |
d5b97f5c | 18 | #include "mma9551_core.h" |
c78b9171 VD |
19 | |
20 | #define MMA9551_DRV_NAME "mma9551" | |
21 | #define MMA9551_IRQ_NAME "mma9551_event" | |
c78b9171 VD |
22 | #define MMA9551_GPIO_COUNT 4 |
23 | ||
c78b9171 VD |
24 | /* Tilt application (inclination in IIO terms). */ |
25 | #define MMA9551_TILT_XZ_ANG_REG 0x00 | |
26 | #define MMA9551_TILT_YZ_ANG_REG 0x01 | |
27 | #define MMA9551_TILT_XY_ANG_REG 0x02 | |
28 | #define MMA9551_TILT_ANGFLG BIT(7) | |
29 | #define MMA9551_TILT_QUAD_REG 0x03 | |
30 | #define MMA9551_TILT_XY_QUAD_SHIFT 0 | |
31 | #define MMA9551_TILT_YZ_QUAD_SHIFT 2 | |
32 | #define MMA9551_TILT_XZ_QUAD_SHIFT 4 | |
33 | #define MMA9551_TILT_CFG_REG 0x01 | |
34 | #define MMA9551_TILT_ANG_THRESH_MASK GENMASK(3, 0) | |
35 | ||
d5b97f5c IT |
36 | #define MMA9551_DEFAULT_SAMPLE_RATE 122 /* Hz */ |
37 | ||
c78b9171 VD |
38 | /* Tilt events are mapped to the first three GPIO pins. */ |
39 | enum mma9551_tilt_axis { | |
40 | mma9551_x = 0, | |
41 | mma9551_y, | |
42 | mma9551_z, | |
43 | }; | |
44 | ||
c78b9171 VD |
45 | struct mma9551_data { |
46 | struct i2c_client *client; | |
47 | struct mutex mutex; | |
48 | int event_enabled[3]; | |
49 | int irqs[MMA9551_GPIO_COUNT]; | |
50 | }; | |
51 | ||
c78b9171 VD |
52 | static int mma9551_read_incli_chan(struct i2c_client *client, |
53 | const struct iio_chan_spec *chan, | |
54 | int *val) | |
55 | { | |
56 | u8 quad_shift, angle, quadrant; | |
57 | u16 reg_addr; | |
58 | int ret; | |
59 | ||
60 | switch (chan->channel2) { | |
61 | case IIO_MOD_X: | |
62 | reg_addr = MMA9551_TILT_YZ_ANG_REG; | |
63 | quad_shift = MMA9551_TILT_YZ_QUAD_SHIFT; | |
64 | break; | |
65 | case IIO_MOD_Y: | |
66 | reg_addr = MMA9551_TILT_XZ_ANG_REG; | |
67 | quad_shift = MMA9551_TILT_XZ_QUAD_SHIFT; | |
68 | break; | |
69 | case IIO_MOD_Z: | |
70 | reg_addr = MMA9551_TILT_XY_ANG_REG; | |
71 | quad_shift = MMA9551_TILT_XY_QUAD_SHIFT; | |
72 | break; | |
73 | default: | |
74 | return -EINVAL; | |
75 | } | |
76 | ||
6da93a67 IT |
77 | ret = mma9551_set_power_state(client, true); |
78 | if (ret < 0) | |
79 | return ret; | |
80 | ||
c78b9171 VD |
81 | ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT, |
82 | reg_addr, &angle); | |
83 | if (ret < 0) | |
6da93a67 | 84 | goto out_poweroff; |
c78b9171 VD |
85 | |
86 | ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT, | |
87 | MMA9551_TILT_QUAD_REG, &quadrant); | |
88 | if (ret < 0) | |
6da93a67 | 89 | goto out_poweroff; |
c78b9171 VD |
90 | |
91 | angle &= ~MMA9551_TILT_ANGFLG; | |
92 | quadrant = (quadrant >> quad_shift) & 0x03; | |
93 | ||
94 | if (quadrant == 1 || quadrant == 3) | |
95 | *val = 90 * (quadrant + 1) - angle; | |
96 | else | |
97 | *val = angle + 90 * quadrant; | |
98 | ||
6da93a67 IT |
99 | ret = IIO_VAL_INT; |
100 | ||
101 | out_poweroff: | |
102 | mma9551_set_power_state(client, false); | |
103 | return ret; | |
c78b9171 VD |
104 | } |
105 | ||
c78b9171 VD |
106 | static int mma9551_read_raw(struct iio_dev *indio_dev, |
107 | struct iio_chan_spec const *chan, | |
108 | int *val, int *val2, long mask) | |
109 | { | |
110 | struct mma9551_data *data = iio_priv(indio_dev); | |
111 | int ret; | |
112 | ||
113 | switch (mask) { | |
114 | case IIO_CHAN_INFO_PROCESSED: | |
115 | switch (chan->type) { | |
116 | case IIO_INCLI: | |
117 | mutex_lock(&data->mutex); | |
118 | ret = mma9551_read_incli_chan(data->client, chan, val); | |
119 | mutex_unlock(&data->mutex); | |
120 | return ret; | |
121 | default: | |
122 | return -EINVAL; | |
123 | } | |
124 | case IIO_CHAN_INFO_RAW: | |
125 | switch (chan->type) { | |
126 | case IIO_ACCEL: | |
127 | mutex_lock(&data->mutex); | |
128 | ret = mma9551_read_accel_chan(data->client, | |
129 | chan, val, val2); | |
130 | mutex_unlock(&data->mutex); | |
131 | return ret; | |
132 | default: | |
133 | return -EINVAL; | |
134 | } | |
135 | case IIO_CHAN_INFO_SCALE: | |
136 | switch (chan->type) { | |
137 | case IIO_ACCEL: | |
d5b97f5c | 138 | return mma9551_read_accel_scale(val, val2); |
c78b9171 VD |
139 | default: |
140 | return -EINVAL; | |
141 | } | |
142 | default: | |
143 | return -EINVAL; | |
144 | } | |
145 | } | |
146 | ||
147 | static int mma9551_read_event_config(struct iio_dev *indio_dev, | |
148 | const struct iio_chan_spec *chan, | |
149 | enum iio_event_type type, | |
150 | enum iio_event_direction dir) | |
151 | { | |
152 | struct mma9551_data *data = iio_priv(indio_dev); | |
153 | ||
154 | switch (chan->type) { | |
155 | case IIO_INCLI: | |
156 | /* IIO counts axes from 1, because IIO_NO_MOD is 0. */ | |
157 | return data->event_enabled[chan->channel2 - 1]; | |
158 | default: | |
159 | return -EINVAL; | |
160 | } | |
161 | } | |
162 | ||
163 | static int mma9551_config_incli_event(struct iio_dev *indio_dev, | |
164 | enum iio_modifier axis, | |
165 | int state) | |
166 | { | |
167 | struct mma9551_data *data = iio_priv(indio_dev); | |
168 | enum mma9551_tilt_axis mma_axis; | |
169 | int ret; | |
170 | ||
171 | /* IIO counts axes from 1, because IIO_NO_MOD is 0. */ | |
172 | mma_axis = axis - 1; | |
173 | ||
174 | if (data->event_enabled[mma_axis] == state) | |
175 | return 0; | |
176 | ||
177 | if (state == 0) { | |
60347e71 VD |
178 | ret = mma9551_gpio_config(data->client, |
179 | (enum mma9551_gpio_pin)mma_axis, | |
c78b9171 VD |
180 | MMA9551_APPID_NONE, 0, 0); |
181 | if (ret < 0) | |
182 | return ret; | |
6da93a67 IT |
183 | |
184 | ret = mma9551_set_power_state(data->client, false); | |
185 | if (ret < 0) | |
186 | return ret; | |
c78b9171 VD |
187 | } else { |
188 | int bitnum; | |
189 | ||
190 | /* Bit 7 of each angle register holds the angle flag. */ | |
191 | switch (axis) { | |
192 | case IIO_MOD_X: | |
193 | bitnum = 7 + 8 * MMA9551_TILT_YZ_ANG_REG; | |
194 | break; | |
195 | case IIO_MOD_Y: | |
196 | bitnum = 7 + 8 * MMA9551_TILT_XZ_ANG_REG; | |
197 | break; | |
198 | case IIO_MOD_Z: | |
199 | bitnum = 7 + 8 * MMA9551_TILT_XY_ANG_REG; | |
200 | break; | |
201 | default: | |
202 | return -EINVAL; | |
203 | } | |
204 | ||
6da93a67 IT |
205 | |
206 | ret = mma9551_set_power_state(data->client, true); | |
207 | if (ret < 0) | |
208 | return ret; | |
209 | ||
60347e71 VD |
210 | ret = mma9551_gpio_config(data->client, |
211 | (enum mma9551_gpio_pin)mma_axis, | |
c78b9171 | 212 | MMA9551_APPID_TILT, bitnum, 0); |
6da93a67 IT |
213 | if (ret < 0) { |
214 | mma9551_set_power_state(data->client, false); | |
c78b9171 | 215 | return ret; |
6da93a67 | 216 | } |
c78b9171 VD |
217 | } |
218 | ||
219 | data->event_enabled[mma_axis] = state; | |
220 | ||
221 | return ret; | |
222 | } | |
223 | ||
224 | static int mma9551_write_event_config(struct iio_dev *indio_dev, | |
225 | const struct iio_chan_spec *chan, | |
226 | enum iio_event_type type, | |
227 | enum iio_event_direction dir, | |
228 | int state) | |
229 | { | |
230 | struct mma9551_data *data = iio_priv(indio_dev); | |
231 | int ret; | |
232 | ||
233 | switch (chan->type) { | |
234 | case IIO_INCLI: | |
235 | mutex_lock(&data->mutex); | |
236 | ret = mma9551_config_incli_event(indio_dev, | |
237 | chan->channel2, state); | |
238 | mutex_unlock(&data->mutex); | |
239 | return ret; | |
240 | default: | |
241 | return -EINVAL; | |
242 | } | |
243 | } | |
244 | ||
245 | static int mma9551_write_event_value(struct iio_dev *indio_dev, | |
246 | const struct iio_chan_spec *chan, | |
247 | enum iio_event_type type, | |
248 | enum iio_event_direction dir, | |
249 | enum iio_event_info info, | |
250 | int val, int val2) | |
251 | { | |
252 | struct mma9551_data *data = iio_priv(indio_dev); | |
253 | int ret; | |
254 | ||
255 | switch (chan->type) { | |
256 | case IIO_INCLI: | |
257 | if (val2 != 0 || val < 1 || val > 10) | |
258 | return -EINVAL; | |
259 | mutex_lock(&data->mutex); | |
260 | ret = mma9551_update_config_bits(data->client, | |
261 | MMA9551_APPID_TILT, | |
262 | MMA9551_TILT_CFG_REG, | |
263 | MMA9551_TILT_ANG_THRESH_MASK, | |
264 | val); | |
265 | mutex_unlock(&data->mutex); | |
266 | return ret; | |
267 | default: | |
268 | return -EINVAL; | |
269 | } | |
270 | } | |
271 | ||
272 | static int mma9551_read_event_value(struct iio_dev *indio_dev, | |
273 | const struct iio_chan_spec *chan, | |
274 | enum iio_event_type type, | |
275 | enum iio_event_direction dir, | |
276 | enum iio_event_info info, | |
277 | int *val, int *val2) | |
278 | { | |
279 | struct mma9551_data *data = iio_priv(indio_dev); | |
280 | int ret; | |
281 | u8 tmp; | |
282 | ||
283 | switch (chan->type) { | |
284 | case IIO_INCLI: | |
285 | mutex_lock(&data->mutex); | |
286 | ret = mma9551_read_config_byte(data->client, | |
287 | MMA9551_APPID_TILT, | |
288 | MMA9551_TILT_CFG_REG, &tmp); | |
289 | mutex_unlock(&data->mutex); | |
290 | if (ret < 0) | |
291 | return ret; | |
292 | *val = tmp & MMA9551_TILT_ANG_THRESH_MASK; | |
293 | *val2 = 0; | |
294 | return IIO_VAL_INT; | |
295 | default: | |
296 | return -EINVAL; | |
297 | } | |
298 | } | |
299 | ||
300 | static const struct iio_event_spec mma9551_incli_event = { | |
301 | .type = IIO_EV_TYPE_ROC, | |
302 | .dir = IIO_EV_DIR_RISING, | |
303 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
304 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE), | |
305 | }; | |
306 | ||
c78b9171 VD |
307 | #define MMA9551_INCLI_CHANNEL(axis) { \ |
308 | .type = IIO_INCLI, \ | |
309 | .modified = 1, \ | |
310 | .channel2 = axis, \ | |
311 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ | |
312 | .event_spec = &mma9551_incli_event, \ | |
313 | .num_event_specs = 1, \ | |
314 | } | |
315 | ||
316 | static const struct iio_chan_spec mma9551_channels[] = { | |
317 | MMA9551_ACCEL_CHANNEL(IIO_MOD_X), | |
318 | MMA9551_ACCEL_CHANNEL(IIO_MOD_Y), | |
319 | MMA9551_ACCEL_CHANNEL(IIO_MOD_Z), | |
320 | ||
321 | MMA9551_INCLI_CHANNEL(IIO_MOD_X), | |
322 | MMA9551_INCLI_CHANNEL(IIO_MOD_Y), | |
323 | MMA9551_INCLI_CHANNEL(IIO_MOD_Z), | |
324 | }; | |
325 | ||
326 | static const struct iio_info mma9551_info = { | |
c78b9171 VD |
327 | .read_raw = mma9551_read_raw, |
328 | .read_event_config = mma9551_read_event_config, | |
329 | .write_event_config = mma9551_write_event_config, | |
330 | .read_event_value = mma9551_read_event_value, | |
331 | .write_event_value = mma9551_write_event_value, | |
332 | }; | |
333 | ||
334 | static irqreturn_t mma9551_event_handler(int irq, void *private) | |
335 | { | |
336 | struct iio_dev *indio_dev = private; | |
337 | struct mma9551_data *data = iio_priv(indio_dev); | |
338 | int i, ret, mma_axis = -1; | |
339 | u16 reg; | |
340 | u8 val; | |
341 | ||
342 | mutex_lock(&data->mutex); | |
343 | ||
344 | for (i = 0; i < 3; i++) | |
345 | if (irq == data->irqs[i]) { | |
346 | mma_axis = i; | |
347 | break; | |
348 | } | |
349 | ||
350 | if (mma_axis == -1) { | |
351 | /* IRQ was triggered on 4th line, which we don't use. */ | |
352 | dev_warn(&data->client->dev, | |
353 | "irq triggered on unused line %d\n", data->irqs[3]); | |
354 | goto out; | |
355 | } | |
356 | ||
357 | switch (mma_axis) { | |
358 | case mma9551_x: | |
359 | reg = MMA9551_TILT_YZ_ANG_REG; | |
360 | break; | |
361 | case mma9551_y: | |
362 | reg = MMA9551_TILT_XZ_ANG_REG; | |
363 | break; | |
364 | case mma9551_z: | |
365 | reg = MMA9551_TILT_XY_ANG_REG; | |
366 | break; | |
367 | } | |
368 | ||
369 | /* | |
370 | * Read the angle even though we don't use it, otherwise we | |
371 | * won't get any further interrupts. | |
372 | */ | |
373 | ret = mma9551_read_status_byte(data->client, MMA9551_APPID_TILT, | |
374 | reg, &val); | |
375 | if (ret < 0) { | |
376 | dev_err(&data->client->dev, | |
377 | "error %d reading tilt register in IRQ\n", ret); | |
378 | goto out; | |
379 | } | |
380 | ||
381 | iio_push_event(indio_dev, | |
382 | IIO_MOD_EVENT_CODE(IIO_INCLI, 0, (mma_axis + 1), | |
383 | IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING), | |
bc2b7dab | 384 | iio_get_time_ns(indio_dev)); |
c78b9171 VD |
385 | |
386 | out: | |
387 | mutex_unlock(&data->mutex); | |
388 | ||
389 | return IRQ_HANDLED; | |
390 | } | |
391 | ||
392 | static int mma9551_init(struct mma9551_data *data) | |
393 | { | |
394 | int ret; | |
395 | ||
396 | ret = mma9551_read_version(data->client); | |
397 | if (ret) | |
398 | return ret; | |
399 | ||
6da93a67 | 400 | return mma9551_set_device_state(data->client, true); |
c78b9171 VD |
401 | } |
402 | ||
403 | static int mma9551_gpio_probe(struct iio_dev *indio_dev) | |
404 | { | |
405 | struct gpio_desc *gpio; | |
406 | int i, ret; | |
407 | struct mma9551_data *data = iio_priv(indio_dev); | |
408 | struct device *dev = &data->client->dev; | |
409 | ||
410 | for (i = 0; i < MMA9551_GPIO_COUNT; i++) { | |
ed3edc09 | 411 | gpio = devm_gpiod_get_index(dev, NULL, i, GPIOD_IN); |
c78b9171 VD |
412 | if (IS_ERR(gpio)) { |
413 | dev_err(dev, "acpi gpio get index failed\n"); | |
414 | return PTR_ERR(gpio); | |
415 | } | |
416 | ||
debf6d84 RD |
417 | ret = gpiod_to_irq(gpio); |
418 | if (ret < 0) | |
419 | return ret; | |
420 | ||
421 | data->irqs[i] = ret; | |
c78b9171 VD |
422 | ret = devm_request_threaded_irq(dev, data->irqs[i], |
423 | NULL, mma9551_event_handler, | |
424 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
425 | MMA9551_IRQ_NAME, indio_dev); | |
426 | if (ret < 0) { | |
427 | dev_err(dev, "request irq %d failed\n", data->irqs[i]); | |
428 | return ret; | |
429 | } | |
430 | ||
431 | dev_dbg(dev, "gpio resource, no:%d irq:%d\n", | |
432 | desc_to_gpio(gpio), data->irqs[i]); | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
438 | static const char *mma9551_match_acpi_device(struct device *dev) | |
439 | { | |
440 | const struct acpi_device_id *id; | |
441 | ||
442 | id = acpi_match_device(dev->driver->acpi_match_table, dev); | |
443 | if (!id) | |
444 | return NULL; | |
445 | ||
446 | return dev_name(dev); | |
447 | } | |
448 | ||
449 | static int mma9551_probe(struct i2c_client *client, | |
450 | const struct i2c_device_id *id) | |
451 | { | |
452 | struct mma9551_data *data; | |
453 | struct iio_dev *indio_dev; | |
454 | const char *name = NULL; | |
455 | int ret; | |
456 | ||
457 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
458 | if (!indio_dev) | |
459 | return -ENOMEM; | |
460 | ||
461 | data = iio_priv(indio_dev); | |
462 | i2c_set_clientdata(client, indio_dev); | |
463 | data->client = client; | |
464 | ||
465 | if (id) | |
466 | name = id->name; | |
467 | else if (ACPI_HANDLE(&client->dev)) | |
468 | name = mma9551_match_acpi_device(&client->dev); | |
469 | ||
470 | ret = mma9551_init(data); | |
471 | if (ret < 0) | |
472 | return ret; | |
473 | ||
474 | mutex_init(&data->mutex); | |
475 | ||
476 | indio_dev->dev.parent = &client->dev; | |
477 | indio_dev->channels = mma9551_channels; | |
478 | indio_dev->num_channels = ARRAY_SIZE(mma9551_channels); | |
479 | indio_dev->name = name; | |
480 | indio_dev->modes = INDIO_DIRECT_MODE; | |
481 | indio_dev->info = &mma9551_info; | |
482 | ||
483 | ret = mma9551_gpio_probe(indio_dev); | |
484 | if (ret < 0) | |
485 | goto out_poweroff; | |
486 | ||
6da93a67 IT |
487 | ret = pm_runtime_set_active(&client->dev); |
488 | if (ret < 0) | |
7d0ead5c | 489 | goto out_poweroff; |
6da93a67 IT |
490 | |
491 | pm_runtime_enable(&client->dev); | |
492 | pm_runtime_set_autosuspend_delay(&client->dev, | |
493 | MMA9551_AUTO_SUSPEND_DELAY_MS); | |
494 | pm_runtime_use_autosuspend(&client->dev); | |
495 | ||
7d0ead5c AR |
496 | ret = iio_device_register(indio_dev); |
497 | if (ret < 0) { | |
498 | dev_err(&client->dev, "unable to register iio device\n"); | |
499 | goto out_poweroff; | |
500 | } | |
501 | ||
c78b9171 VD |
502 | return 0; |
503 | ||
504 | out_poweroff: | |
505 | mma9551_set_device_state(client, false); | |
506 | ||
507 | return ret; | |
508 | } | |
509 | ||
510 | static int mma9551_remove(struct i2c_client *client) | |
511 | { | |
512 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
513 | struct mma9551_data *data = iio_priv(indio_dev); | |
514 | ||
7d0ead5c AR |
515 | iio_device_unregister(indio_dev); |
516 | ||
6da93a67 IT |
517 | pm_runtime_disable(&client->dev); |
518 | pm_runtime_set_suspended(&client->dev); | |
519 | pm_runtime_put_noidle(&client->dev); | |
520 | ||
c78b9171 VD |
521 | mutex_lock(&data->mutex); |
522 | mma9551_set_device_state(data->client, false); | |
523 | mutex_unlock(&data->mutex); | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
6da93a67 IT |
528 | #ifdef CONFIG_PM |
529 | static int mma9551_runtime_suspend(struct device *dev) | |
530 | { | |
531 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
532 | struct mma9551_data *data = iio_priv(indio_dev); | |
533 | int ret; | |
534 | ||
535 | mutex_lock(&data->mutex); | |
536 | ret = mma9551_set_device_state(data->client, false); | |
537 | mutex_unlock(&data->mutex); | |
538 | if (ret < 0) { | |
539 | dev_err(&data->client->dev, "powering off device failed\n"); | |
540 | return -EAGAIN; | |
541 | } | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | static int mma9551_runtime_resume(struct device *dev) | |
547 | { | |
548 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
549 | struct mma9551_data *data = iio_priv(indio_dev); | |
550 | int ret; | |
551 | ||
552 | ret = mma9551_set_device_state(data->client, true); | |
553 | if (ret < 0) | |
554 | return ret; | |
555 | ||
556 | mma9551_sleep(MMA9551_DEFAULT_SAMPLE_RATE); | |
557 | ||
558 | return 0; | |
559 | } | |
560 | #endif | |
561 | ||
c78b9171 VD |
562 | #ifdef CONFIG_PM_SLEEP |
563 | static int mma9551_suspend(struct device *dev) | |
564 | { | |
565 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
566 | struct mma9551_data *data = iio_priv(indio_dev); | |
6da93a67 | 567 | int ret; |
c78b9171 VD |
568 | |
569 | mutex_lock(&data->mutex); | |
6da93a67 | 570 | ret = mma9551_set_device_state(data->client, false); |
c78b9171 VD |
571 | mutex_unlock(&data->mutex); |
572 | ||
6da93a67 | 573 | return ret; |
c78b9171 VD |
574 | } |
575 | ||
576 | static int mma9551_resume(struct device *dev) | |
577 | { | |
578 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
579 | struct mma9551_data *data = iio_priv(indio_dev); | |
6da93a67 | 580 | int ret; |
c78b9171 VD |
581 | |
582 | mutex_lock(&data->mutex); | |
6da93a67 | 583 | ret = mma9551_set_device_state(data->client, true); |
c78b9171 VD |
584 | mutex_unlock(&data->mutex); |
585 | ||
6da93a67 | 586 | return ret; |
c78b9171 | 587 | } |
c78b9171 VD |
588 | #endif |
589 | ||
590 | static const struct dev_pm_ops mma9551_pm_ops = { | |
591 | SET_SYSTEM_SLEEP_PM_OPS(mma9551_suspend, mma9551_resume) | |
6da93a67 IT |
592 | SET_RUNTIME_PM_OPS(mma9551_runtime_suspend, |
593 | mma9551_runtime_resume, NULL) | |
c78b9171 VD |
594 | }; |
595 | ||
596 | static const struct acpi_device_id mma9551_acpi_match[] = { | |
597 | {"MMA9551", 0}, | |
598 | {}, | |
599 | }; | |
600 | ||
601 | MODULE_DEVICE_TABLE(acpi, mma9551_acpi_match); | |
602 | ||
603 | static const struct i2c_device_id mma9551_id[] = { | |
604 | {"mma9551", 0}, | |
605 | {} | |
606 | }; | |
607 | ||
608 | MODULE_DEVICE_TABLE(i2c, mma9551_id); | |
609 | ||
610 | static struct i2c_driver mma9551_driver = { | |
611 | .driver = { | |
612 | .name = MMA9551_DRV_NAME, | |
613 | .acpi_match_table = ACPI_PTR(mma9551_acpi_match), | |
614 | .pm = &mma9551_pm_ops, | |
615 | }, | |
616 | .probe = mma9551_probe, | |
617 | .remove = mma9551_remove, | |
618 | .id_table = mma9551_id, | |
619 | }; | |
620 | ||
621 | module_i2c_driver(mma9551_driver); | |
622 | ||
623 | MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>"); | |
624 | MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); | |
625 | MODULE_LICENSE("GPL v2"); | |
626 | MODULE_DESCRIPTION("MMA9551L motion-sensing platform driver"); |